Internal-combustion engine.



. 1. GOVLAT'A E L. ROBERTS.

INTERNAL comausrlpu ENGINE. APPLICATION FILED FEB l0.r [91T- PatentedFeb. 29,1918.

2 SMEETS-SHET I.

A. J. GOLATAW L. L. ROBERTS.

INTERNAL COMBUSTION E NGINE.

APPLICATION FILED FEB. I0. 19H- Q0. 1 Gu 1 nu. 2 1D. 6 F d m m 2'SHEETS-SHEET 2.

UNITED STATES PATENT oEEIoE. Y

ANDREW J. GOLATA AND LoUIs L. ROBERTS, or DETROIT, 'MIOIIIGAEL As'sidNoRs .OE ONE-TENTII To ARTHUR L. ELLIS, or DETROIT, MICHIGAN, ANDONEQTENHT WILLIAM w. cARswELL, OE HIGHLAND PARK, MICHIGAN.

INTERNAL-UOMBUSTION ENGINE.

Specification of Letters Patent.

. Application mea rebmaryio, 1917. serial no. 147,792.

and LOUIS L. ROBERTS, citizens o f the United States of America,residing at Detroit, in the county of Wayne and State, of'Michlgan,

have invented certain new and useful Im' our invention is to provide anengine where in the piston arrangement tends to properly balance thecrank shaft of an engine, eliminate vibration, and thus insure smoothrun.- ning and a hi hly eilicient explosive engine.

Another ob3ect of our invention is to provide an internal combustionengine with reciprocable inner and outer pistons operable in opposedrelation with the Outer is` ton serving functionally as cylinder va vescontrolling the ignition inlet and exhaust of gases to and from thecombustion chambersl between the heads of the inner and Outer'fpistons.

A urther ob'ectof our invention is to provide an exp osive engine with apiston arrangement as defined above, wherein no rtiOnOf-a fresh chargeof gas is lost dur- 1n exhaust, as the explosive mixture admItted to thechambers of the engine is reduced to atmospheric pressure and a freshcharge em loyed as a scavenging agent.

to provide an engine ofthe above type whereinlthe parts are constructedwith a view ofreducing the cost of manufacture,

ular construction to be hereinafter described' and' then claimed.

Reference will now had to the drawings, wherein Figure v1 is alongitudinalsectional view Fig. 2 .is a vertical sectional view taken onthe line II-II of Fig. 1; and

{III-III of-Fig. 1.

Fig. 3 is a similar view taken on thellin'e In the drawings, 1

A still urtherobject of our invention is tion of v alve 1 6: may be.

' ofthe shaft 3 by connecting rodsOt denotes a crank case havingsuitable 2 for a crank shaft 3, and. said. forfank shaft cams 6. Thesets of crank portions'4 land v5 I are in opposed positions'relativegtQfh?. axis 60 ofthe crank shaft 3 so that thflcrankshaft' will beproperly balanced." y i.

7 denotes cylinders supportedby the sectional crank easel and lthese lcylinders are provided with jackets 8. and conneoted by' Ousings 9 and10. The housiu'glOpi-.ovides a chamber 11 having' an intakel port 12,fora suitable fuel, as gasolenebrjkerosne 'sup plied from a oarburetindevic`,e tom of the chamber 11i 'as 13 for valve'rods 14 topf.v oflthe'lchamber has ports providing alvefy seats 15 for. valves 16. The valves'Ilfi are of thel puppet type and are n oii aly seated-fon closed by theexpansive ,fore of prin 'SVITQ' arranged on valve rods v1.4, ing 10.Above the chaliiberv communicating with thecyhnder ports being separatedbyia partitiori. 19,' so that the valves 16 may helndpendentl'ylL80actuated to supply an eXplos'ive'I'ni'X Efe means of cams 6 to thecylinders i'.imcd'.. relation to the operationl of thepistol saidcylinders. Access had'tdj-l-tli 18 forgrinding the valye' seat themedium of the detachablelcovf lin the lower partof t1i's ho`f ingl videdwith rollers or aIiti-frime V 23 engaging thez cams Ggsethjt trolled bthe crank shaft `Slidab e in the cylinder-Tarte piston valves 2li-aandthejheadgfo tons are provided' with intakefp spark lug `openings 261,flrit'ejl ed ends o the plstons 24 are wris pi -trudinginto thehousings-9" ndlO'a nected tosaid wrist pinsand'the crank portions 4 ofthe shaft 3 are connecting rods128. Slidable in the'outer pistons 24 areinner pistons -29 connected to the crank portions 5 casi-f The cylinders7, contiguousito the lower 1015 ends thereof'have exhaust portey 31 incommunication witha suitable exhalistinanifold 32, and the Outer4vp1st0ns24 provided lio with exhaust 83 ada ted to register with theexhaust ports 81 o `the cylinders 7.4

The cylinders 7 and the water jackets 8 thereof are provided withspark-plug openings for spark 34:, and the spark plug oei'iin 26 o e aapte to register therewith, so that an exlosive mixture in the outerpiston 24 may e ignited. In operation, one of the valves 16 will establish. communication between the chamber 11 and 'one' of the cylinders7 and as there is 29 approaching'eacligother an as soon as the, 26

reduction of atmospheric ressure in the cylinder on the'downstroke o theouter piston the explosive mixture' is drawn into thecyiin'der, Onfthereturiior upstroke of the outer piston 24'the valve 16 is closed, the

mixture is slightlycompressed until the ports 25 register with the'ports 18, at which me the charge or mixture is forced into. the outerpiston` 2`4 betweenfthe headthereof and the'jhead ofthe `piston.'.29'.The charge or mixture islcompressed by the istons24. and

opening `26 comcideswith .the spark. ug opening' the is ignited thepistons and '29 driven away from each other..` A' downward movementof-the piston 29 will eventually uncover theexhaust port '331 of therpiston 24,- while saidpiston carries the port 'e34 inte registratieswiththe.

.portl :and the. intake `of a; fresh .chait'ge tends to drivethgxhaust-.gasesfrom' e combustion chaiiibe'r.4 I,

We desire to direct attention tothetfact that the ports 1'8 4are'ofgreater depththan the' piston, ports 25 so' that acharge' in .theupper,A ends ofthe cylinders 7 may readily.

` pass into the ports-418` and into the ports 25,

thus reven" achar from bein'tra edp tmg E; cylindersg. with in the upperends'of t the istons in one cylinder coperatin and' .the ignition insaid cylinder timed :re ative and more uniform powjer obtained .to theignition in the other cylinder of the engine, the crank shaft will be.smoothly than .i f a..;single.pistonwere used .in each cylinder.4 Byconstructingxtheouter. istons A to serve functionally as valveswe o taina. '60

hi lier degree ofeiciency tan-if extra v wereemployedfor controllin theof fuelftothe` combustione berlo theoute'r pistonsand we would have itunderstood: that multi-cylinder engines.,

be ying principles louter pistons 24 are wardly between 4sai cylinders`said valve' rods to open said* valvesyinnerl and outer istons slidableone within the other and t e outer pistons slidble insaid. cylinders andprovided with intake and exhaust ports, two connecting rods for -eachouter piston, and a single connecting rodfor each inner piston, allofs'aid connecting rods articulatin the ypistons relative tothe crankportions o said crank shaft.

2. In an internal combustion engine, a 1 crank shaft, 4c lindersprovided with fuel in-V take ports, a: ousing between saidA cylindersprovided with a chamber` adapted to-com` municate with the intake portsof said rcylinder, said chamber. having fa fuel -intakefpor valvesnormally seated on a ported* wallof said chamber vcontrollingltheadmission of' fuel to said cylinders, `valve rods-fors`aid valvesextending through'said chamber and said lhousing in proximity tosaid-shaft,y cams on said shaft to actuate said valve rods to seated,Iinner and outer pistons slidable one within the other and the outerpistons" slid'- able in said cylinders and coperating with the innerpistons in providing combustionl ao unseat said valves,` springs on saidrods in said housing holdingsaid valves normally chambers, said outerpistons `beingported` for intake and exhaust purposes, ineaiis connect`ing thej-outerpistons tosaid crank shaft` means connectingthe innerpistons to said crank shaft, and-ignitionnieans adapted for firing lfuelin the said pistons.v Y

combustion chambers" 'of turesin presence of two witneses.

AND-REW J. `Grondin.. Louis n ROBERTS; fr

Witn:

H. Burma, -ANNA Donali

